
  <nz-affix>
    <button nz-button [nzType]="'primary'">
      <span>Affix top</span>
    </button>
  </nz-affix>
  <br>
  <nz-affix nzOffsetBottom="0">
    <button nz-button [nzType]="'primary'">
      <span>Affix bottom</span>
    </button>
  </nz-affix>
  